Hi, my father is 64 years old. He has been seeing spots in his vision in form of grey circles in the last four days (in his left eye only). He went to his ophthalmologist and he reassured him that the retina is in good shape but he told him that he needs to stop exercising and that he needs to stop holding stuff that weigh too much for a period of one month. He also asked him to visit him immediately if he sees spots during this month. My father plays tennis so does having eye floaters will be an obstacle for him to stop exercising? Thank you.